Lock for exit bolts



July 19, 1932. N VAN s S LOCK FOR EXIT BOLTS Filed May 28, 1929 Patented July 19, 1932 UNITED STATES.-

PATENT oFFioE IRVING N. VAN SIGKLES, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT 8?; COMPANY, OF NEW HAVEN, CONNECTICUT LOCK FOR EXIT BOLTS Application filed May 28,

This invention relates to a lock for exit bolts and more specifically to a lock for socalled panic bolt locks of the type which are applied to the doors of public buildings, such as schoolhouses, theaters, apartment houses,

stores, and the like, for facilitating exit when. a panic results from a fire or other cause. The invention applies particularly to a rim 7 lock of the above character, although it will 10 be apparent from the description of the invention that certain of the features thereof may be used in connection with'other types of locks aswell. The general object of the invention is to provide an arrangement for locking a panic bolt lock or the like in unlocked position so that the door or doors to which it is applied may be freely opened or closed.

Another object of the invention is to pro videa lock of the above character wherein there is no danger of locking the panic bolt lock against retraction.

To these and other ends, the invention con-' sists in the novel features and combination of parts to be hereinafter described and claimed.

In the drawing,

Fig. 1 is a fragmentary view of a door and door casing having an emergency lock applied thereto, and my improved means for locking the emergency lock in retracted posi- 30 tion; v

Fig. 2 is a fragmentary view of the improved means for locking the emergency lock in retracted position;

Fig. 3 is a sectional view along line 33 of Fig. 2;

Fig. 4 is a fragmentary view showing a part of the locking mechanism; and

Fig. 5 is a sectional view along line 5-5 of Fig. 2.

Referring'to the drawing in which I have illustrated my invention by showing a preferred embodiment of the same, the reference numeral indicates, in general, a door frame having a door 11 mounted therein and held against movement by. an emergency exit lock generally designated by the reference nu meral 12. The mechanism ofthe emergency exit lock may be of any general type, for eX- ample, that shown in the patent to William J. 50 Carroll, No. 1,674,760, June 26, 1928, and will 1929. Serial No. 366,687.

not be described herein in detail. Emergency eXit locks of the general type shown in the patent referred to are provided with a bar mounted on the interior side of a door which may be depressed to unlock the door,the latter upon being unlocked swinging outwardly. The presentinvention relates to locks of the above character and to improvements therein wherein means is provided forlocking the panic bar or similar operating member in unlocked position so that the door may be freely opened or closed.

Herein the reference numeral 13 indicates a panic bar having at the ends thereof'arms 14 and '15 pivotally mounted in brackets 16 and 17 which are secured to an inner face of door 11. Bracket 17 is generally hollow and provided with spaced outwardly extendi-ng arms 18 and 19, pivotally supporting a pin 20 passing through arm 15 and secured therein by any suitable means, as for example, screw 21.

Mounted in bracket 17 between guides 22 and 23 and transversely slidable therein is a dog 24 provided with a notch 25 in which the end 26 of arm 15 may be received when panic bar 13 is fully depressed. Mounted in bracket17, adjacent the upper end of dog 24 is a rotatable plug 27 having its inner end cut away at 28 and 29 to form a somewhat rectangularly shaped stem 30, the lower end of which is received in a notch 31 in the upper end of dog 24, the latter being cut away above notch 31, as at 32, to provide clearance for the upper end of stem as the latter is rotated with plug 27. Plug 27 is held against inward movement by head 33 bearing against the outer surface of bracket 17 and against outward movement by means of disc 34 secured to the end of stem 30 by means of screws 35 and 36, dog 24 being milled or countersunk, as at 37, for the reception of disc 34. Mounted between the upper end of dog 24 and bracket 17 is a detent spring 38 provided with a bulged part 39, which cooperates with an abutment 40 on the inner upper end of dog 24 to hold the dog in engagement with or disengaged from the end 26 of arm 15. Plug 27 may be provided with a key receiving opening of any desirable shape, herein being provided with spaced axially extending holes 41 and 42 in which the end of a spanner-like key may be received to rotate the plug.

The operation of the device may be readily understood from the above description but will be briefly described as follows: The normal position of the dog 24 is shown in dotted lines in Fig. 2 wherein the end 26 of arm is disengaged from notch'25 indog 24. In this position the panic bar '13 may be depressed in the usual manner to unlock the door, and upon the door being closed will be raised by the usual spring to lock the door. lVhen it is desired to lock the emergency exit locking mechanism in retracted position, the panic bar 13 is depressed until the end 26 of arm 15 is opposite notch 25, whereupon the plug 27 may be rotated by a key inserted therein to bring notch 25 on dog 24 into engagement with the end 26 of arm 15 to hold the latter against downward movement and the emergency exit lock mechanism locked against protraction. The mechanism may be readily restored to its normal condition by inserting a key in plug 27 and rotating the latter to disengage the dog 2e from the end 26 of arm15, whereupon the panic bar 13 will be raised by the usual spring or other means to lock the door.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all the details shown, but is capable of modification and variation within the spirit of the invention and thescope of the appended claims.

WVhat I claim is:

1. In a look, a casing, a latch retracting lever pivotally mounted in said casing, a pair of spaced transversely extending guideways in said casing, a slidable dog mounted between said guideways, said dog being provided with a notch in which said lever may be received to be held against movement, a rotatable plug mounted in said casing near the upper end or" said dog, said dog being provided with a notch near the upper end there of, a stem on said plug received in said notch and adapted in cooperation therewith to move said dog in said guideways into and out of engagement with said lever upon rotation of said plug, and a spring mounted between said dog and easing, said spring being provided with a bulge therein, and an abutment on said dog adapted to cooperate with the bulge to retain the dog in either of said positions.

2. In a panic bar lock, a casing, a panic bar having an arm extending into and pivotally mounted in said casing, a pair of spaced guideways in said casing extending transversely of the path of movement of the end of the arm, a slidable dog mounted between said guideways, said dog being provided with said plug, and means for retaining said dog in either of said positions.

3. In a panic bar look, a casing, a panic bar having an arm extending into and pivotally mounted in said casing, a pair of spaced guideways in said casing extending transversely of the path of movement of the end of the arm, a slidable dog mounted between said guideways, said dog being provided witha notch in whichsaid arm may be received to beheld against movement, a rotatable plug mounted. in said casing near the upper end of said dog, said dog being provided with a notch, and a stem on said plug received in said notch and adapted in cooperation therewith to move said dog in said guideways into and out of engagement with said arm upon rotation of said plug.

4:. In a panic bar look, a casing, a panic bar having an arm extending into and pivotally mounted in said casing, a pair of spaced guideways in said casing extending transversely of the path of movement of the end of the arm, a slidable dog mounted between said guideways, said dog being provided with a notch in which said arm may be received to be held against movement, a rotatable plug mounted in said casing, and means on said plug adapted to engage said dog to move the latter into and out of engagement with said arm upon rotation of said plug,

5. In a panic bar lock, a casing, a panic bar having an arm extending into and pivotally mounted in said casing, a pair of spaced guideways in said casing extending transversely of the path of movement of the end of the arm, a slidable dog mounted between said guideways, said dog being provided with a notch in which said arm may be received to be held against movement, a rotatable plug mounted in said casing, and means for mov- .ing said dog in said guideways intoengagemeans on said casing adapted to move said dog into engagement with said lever.

7. In a look, a casing, a latch retracting lever pivotally mounted in said casing, transversely extending guideways in said casing,

a slidable dog mounted in said guideways, said dog being provided with a notch in which said lever may be received to be held against movement, means on said dog engaging said lever throughout the limits of movement of the latter to hold the dog against movement except when the lever is opposite the notch, and means on said casing for moving said dog into engagement with said lever.

8. In a'lock, a casing, a latch retracting lever pivotally mounted in said casing, a slidable dog mounted in said casing, said dog being provided with a notch in which said lever may be received to be held against movement, means on said dog engaging said level throughout the limits of movement of the latter to hold the dog against movement except when the lever is opposite the notch, and means in said casing for moving said dog into engagement with said lever.

9. In a lock, a casing, a latch retracting mechanism having a part thereof extending into said casing, a slidable dog mounted in said casing, means on said dog adapted to engage said part to hold the latter against movement in one position of the part, and means on said dog for holding said dog against movement in all other positions of said part.

10. In a lock, a casing, a latch retracting mechanism having a part thereof extending into said casing, a slidable dog mounted in said casing, means on said dog adapted to engage said part to hold the latter against movement, means in said casing for moving said dog into engagement with said part, and means on said dog for holding the dog against movement except when the partis in a predetermined position.

11. In a lock, a casing, latch retracting mechanism having a part thereof extending into said casing, a dog mounted in said casing, and adapted to hold said part against movement when the latter is in a predetermined position, and means on said dog for preventing said dog from moving into part holding position except when said part is in a predetermined position.

12. In a latch, a casing, latch retracting mechanism having a part thereof extending into said casing, a dog having a shoulder thereon arranged to engage said part when the latch retracting mechanism is in retracted position to hold said part against movement, and means on said dog engaging said part to hold the dog against movement except when the latch retracting mechanism is in retracted position.

13. In a latch, a casing, latch retracting mechanism having a movable arm extending into said casing, a dog having a notch in which said arm may be received to be held against movement, and a part on said dog extending parallel to the path of movement of said arm and adapted to engage the latter to hold the dog against movement except when the arm is opposite said notch.

14. In a lock, a casing, a latch retracting mechanism having a part thereof extending into said casing, a slidable dog mounted in said casing, saiddog being provided with a notch in which said part may be received to be held against movement, means on said dog engaging said part throughout the limits of movement of the latter to hold the dog against movement except when the part is opposite the notch, and means in said casing for moving said dog into engagement with said part.

In witness whereof, I have hereunto set my hand this 21st day of May, 1929.

IRVING N. VAN SIGKLES. 

